Do mains cables make a difference??

[Barry]

I'm afraid his first sentence spoils it for me:

Every audiophile who has experimented with better power cables has heard the performance advantage they offer.

It is just another manufacturer's attempt to convince you to buy their wares with some 'techno-babble' explanations. Some of what he writes is correct, some of it is vague, some contradictory and some of it is incorrect.